There never has been an option in Word to read or print .pdf-files. You really need a pdf-reader, like the one from Adobe or foxit or nitro.

If that reader is correctly installed, it will open pdf-documents with a double click, both in your mail program and in My Computer/Windows Explorer. If that doesn't work you might have to reassign the file association of .pdf to that program. http://www.winvistaclub.com/t19.html tells you how to do that, in case you don't know.

Kees